11.24: Two wave pulses travel to the right tow1ug;y j/, aza7ih s2re8tiz ;card a rigid boundary as shown. After reflection of the triangular pulse, the pulses will interfere. Which one of the following pictures best represents the superposition of the pulses when the centers of the individc 2zy7/ri, h 1g ijsaeaz;;tu8ual pulses coincide?

  08.30: A light beam passes tuff gf/oe:-d(hrough the air and strikes the surface of a plastic block. Which pair of statements correctly describes the phase cha/e fgf:uf-o( dnges for the reflected wave and the transmitted wave?

  12.02: A ray of light passes straiguv/lsefny d 6lqpoe -3a1137lht downward through the point labeled B in the diagram shown13ld17/-af 6ls evoqy pue nl3. The ray reaches a flat mirror placed at an angle $\Theta$ to the horizontal as shown. Which one of the locations labeled in the figure best represents the point through which the ray reflected from the mirror will pass?

  00.04: Specular reflection occurs whenever light is incident one0)ulh xp+ d*e83td 0/d2o9fkpv rzvr

  05.18: A student hold a hand mirror to observe the back of her head while 2z .yqze .crw1t9p9 eestanding in front of and looking into a wall mirror. If she is standing 4 ft in front of the wall mirror and sheecewy.z eqp.z r2t991 holds the hand mirror 1 ft behind her head, she will see the back of her head how far behind the wall mirror?

  14.25: It is observed that a light ray changes directionwt,jzt/)n8 q 82-wey5lmw j ja when it enters a new material. Which one of the following choices is the term best associated with this phenomenon wm /-5y8n ww)tjze, 2j8lqtaj?

  96.19: Light that has wavelength of 500 nm in air has wavelength 400 nm in a tra gw)c-+w0f trlnsparent material. What is thelw+cf -wrtg0) index of refraction of the material?

  98.04: As sound travels from steel ind o9-l iz-q1urr *h4i eug7rn4to air, both its speed and its:

  00.01: As a wave moves from one medium to a secohi3*8c3 rb( x uqie(mozyht4)nd medium with a different index of refraction which of the following wave properties would 8 yox(iem )thqcrb3u*3(zih4NEVER change?

  05.47: A sound wave genera;jbv39 oa16llui wb/ nted from a tuning fork of single frequency travels from air (with speed of sound 340 m/s) into rock (with speed of sounw;vu 1 o/jl9 n3iblb6ad 1500 m/s). Which statement is true about the wavelength and frequency of the sound as it passes from air to rock?

  14.28: A waterproof speaker plac06(- i ph8anmv)bqdr led at the bottom of a swimming pool emits a sound wave that travels toward the surface of the q6d)pa h0-i mr(vbl 8nwater. In the water, the sound wave has a frequency $f_{water}$, wavelength $\lambda_{water}$ , and wave speed $v_{water}$ . When the sound wave enters the air it has a frequency $f_{air}$ ,wavelength $\lambda_{air}$, and wave speed $v_{air}$ . Which one of the following relationships correctly compares the frequencies, wavelengths, and wave speeds of the waves in the air and water?

  02.33: A short burst of ojhpbb cb;()i 5ewqhv*+ j(1qwhite light strikes a rectangular glass block with an angle ofp(bb+c(h iqe;jw *vh)j bo 15q incidence of $0^0$. Which color of transmitted light would be the first to emerge from the opposite side?

  96.02: A beam of light is directed t5k hix4b;ah r:e ;m*oioward a point P on a boundary as shown to the right. Which segment best represents the refractax5 r4k:hi;b ohe*;m ied ray?

  98.17: Which diagram best represents what happn q z2(rqrhd1dn(a3:vf3,wkpens to a ray of light entering air from water? Air is at tr1wq3,a zn(rh f2vd:(kpn qd3he top in all diagrams.

  94.11: The critical angle of a material is the-bnpxy3zzp 6i/k sgm-r*8h l1 angle of incidence for which the angle of refracm-k8rz bxh/spy63z-gi p l n1*tion is:

  95.12: The principlev 7s iad2pdr;dcy86u;v thz 55 underlying fiber optics is:

  98.36: The critical angle in a transparent substance surro(c bl1vh h1 q5ek8vq9lunded by air is $30^{\circ}$. The speed of light in
the substance (in multiples of $10^8$ m/s) is most nearly

  01.28: Light travels from material X with an index of x9ob()ewu;ur x h( em(refraction of n = 1.5 to material Y with an index of refraction of n = 2.0. If the speed of light in material Y is v, what is the speed of lighbhw( e( xe;)uuom9 x(rt in material X?

  03.15: A jeweler can distinguislqt2jl7 y) o(tjf );mxh between a diamond and a piece of glass by observing the critical angle of the light in each material. Glass with an index of refraction of 1.52 has a critical angle oxtq )lm )y fjot;(j72lf $41.1^{\circ}$ while a diamond with an index of refraction of 2.42 would have a critical angle of:

  05.26: Light shines from air into a clear material. When the light makes apgkd6uc/v(np ebc/mq7d+ *ky 2q / qt8n angle of incidevqcqk e/p/ck+d y* 2p7n(t/6u db8gmqnce equal to $30.0^{\circ}$, the light refracts at an angle of 1$5.0^{\circ}$. If the light is shone from an angle of incidence of $60.0^{\circ}$, what is the angle of refraction?

  95.40: A Metrologic laser is embedded i cr5gswnaa5xn9 f7 l7:n a material of index of refraction n. The laser beam emerges from the material and hits a target. See the accompanying figure for the position parameters of the laser and target. The value of n ia:775ang ns5lx c9w rfs:

  95.31: A beam of light passes from medium 1 to medium 2 t3cgfy jl0o*o8 o medium 3 as shown in the accompagyfl8cojo3 *0 nying figure. What is true about the respective indices of refraction (n1, n2, and n3)?

  00.14: A beam of light passes from meo 6vslg/q5:solr kwcdqp 0:d h i-)+49jcsi 3fdium 1 to medium 2 to medium 3 as shown in the diagram. What may be concluded about the three indexecg4:+-q lf5sd k3di s cwo ijvp:6or 9qh0s/l)s of refraction, n1, n2 and n3?

  97.24: The accompanying diagram shows the path tha 3 m)m9h4pnqjrlq+1dxt a light ray takes passing through three transparent materials. The indices of refraction in materials 1, 2, and 3 are n1, n2, and n3, respectively. Which of the following best describes the relation between the indices of refraction?4 1dqpn3hx+q9rm)lm j

  09.34: The diagram below shows the path taken by a monochro5fe l15chf bl:oas57 gylv sg+oyk)*1matic light ray traveling through three media.The syosek 7gcl1b5l:vyah5f)1 5+*lgof s y mbols $v_1$,$\lambda_1$ , and $f_1$ represent the speed, wavelength, and frequency of the light in Medium 1, respectively. Which of the following relationships for the light in the three media is true?

  99.26: A beam of light traven8k2akbb5 p:qnku: r:ling in glass ($n_g$=1.5) strikes a boundary with air ($n_a$ =1.0) at point P.The angle
of incidence is $60^{\circ}$ as shown in the diagram. Which ray would best indicate the beam’s path after point P?

  04.35: A ray of light is inc8 yww9 zu (pa5glxfp,)ident on the surface of a rectangular block of glass at an ang,98x )alzfpwu( 5gy wple of $45^{\circ}$. It refracts into the glass and then strikes the side of the block as shown in the diagram. What would be the most likely path of the light after striking the side of the glass block?

  13.27: Light of wavelength 600nm is transmitted from air into a piwza( x cf3h+k ktn0/u;ece of glass. Which one of the n0 k+h(ktufz;c3/ aw xlabeled arrows best indicates the path of the light ray after it enters the glass?

  14.44: A ray of monochromatic light enters the right-triangulan5u4oahk6ryq 56i/ ( djucuxqr-ps3o*e (4zar glass as shown. The glass has an index of refraction o5 (s4qde4a n6/5* h zupuci yr qkr6o(ouj-3xaf 2.00 and it is surrounded by air. Which one of the lettered rays shows the path of the light after it exits the glass?